Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 85 for “"Continuous variable"”.
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QUANTUM COMMUNICATIONS IN CONTINUOUS VARIABLE SYSTEMS
… of quantum technologies. In particular, continuous variable systems, employing coherent-state encoding and quadrature measurements, represent a suitable platform, due to their compatibility with both the modulation and detection systems currently employed in standard fiber-optical …
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Motional state engineering for continuous-variable quantum computation
… alternative approach to quantum computation is continuous-variable quantum computation (CVQC), which uses physical observables, such as the strength of an electromagnetic field or the position of a particle in space, whose numerical values belong to continuous intervals. Trapped ions are …
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Characterizing and measuring properties of continuous-variable quantum states
… infinite-dimensional Hilbert spaces, so-called continuous-variable systems'', which are needed to describe quantum optics beyond the single photon regime and other Bosonic quantum systems. We present methods to obtain a description of such systems from a series of measurements in an efficient …
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Some applications of continuous variable neighbourhood search metaheuristic (mathematical modelling)
In the real world, many problems are continuous in nature. In some cases, finding the global solutions for these problems is di±cult. The reason is that the problem's objective function is non convex, nor concave and even not differentiable. Tackling these problems is often computationally too …
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Improving the Security of Continuous Variable Quantum Random Number Generators
… This thesis focuses on improving the security of continuous variable QRNGs. The first part of this thesis focuses on the first proof-of-principle experimental implementation of a new semi-device independent continuous variable QRNG protocol. This protocol exploits a gain-switched laser to randomly …
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Protocols and Resources for New Generation Continuous Variable Quantum Key Distribution
… of the development of QKD is done with discrete variables (DV), i.e. qubits with the underlying system of single photons. This is one interpretation of an optical field. Alternatively an optical field can be interpreted as wave with the continuous variable (CV) observables of phase and amplitude. …
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Protocols and Resources for New Generation Continuous Variable Quantum Key Distribution
… of the development of QKD is done with discrete variables (DV), i.e. qubits with the underlying system of single photons. This is one interpretation of an optical field. Alternatively an optical field can be interpreted as wave with the continuous variable (CV) observables of phase and amplitude. …
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Practical Continuous Variable Quantum Key Distribution System with ‘Local’ Local Oscillator
… with dedicated single-photon based discrete variable (DV) QKD protocols, continuous variable (CV) QKD systems have attracted more attentions in recent years, as they benefit from their compatibility with commercial off-the-shelf (COTS) telecommunication components and high key rate over …
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Practical, High-Speed, Gaussian Modulated Coherent State Continuous Variable Quantum Key Distribution with Real-Time Post Processing
… was originally proposed using discrete variables. Later, continuous-variable quantum key distribution has been introduced. Continuous variable quantum key distribution with Gaussian modulated coherent states has gained interest due to its security and compatibility with classical …
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The asymptotic and oscillatory behaviour of difference and differential equations
… neutral difference equations of any order with continuous variable and another type of higher even order nonlinear neutral difference equations to be oscillatory.
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Local approach to quantum entanglement
… are many reasons to focus on the entanglement of continuous-variable states since the underlying degrees of freedom of physical systems carrying quantum information are frequently continuous, rather than discrete. Much of the effort has been concentrated on Gaussian states, because these are …
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Quantum discord, EPR steering and Bell-type correlations for secure CV quantum communications
… Steering" and "Bel-type correlations" in the continuous-variable quantum states and investigate their practical applications for the secure quantum communication. While previously quantum entanglement was considered as the only form of quantum correlation, in the recent years a notion known as …
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Quantum discord, EPR steering and Bell-type correlations for secure CV quantum communications
… Steering" and "Bel-type correlations" in the continuous-variable quantum states and investigate their practical applications for the secure quantum communication. While previously quantum entanglement was considered as the only form of quantum correlation, in the recent years a notion known as …
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Three Statistical Problems With Imprecisely or Incompletely Observed Data
… and economic studies, observations on certain variables may be grouped or measured with errors, which poses challenges to the usual statistical methods. This thesis consists of three studies in this general area. First, we study linear calibration of a crude device to a more accurate one. …
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Exploring The Relationship Between Preadmission Factors And Dental School Student Success
… to assess the relationship of the pre admission variables to the continuous variable Dental School GPA. Logistic regression analysis was conducted to assess the relationship of the pre admission variables to the dichotomous categorical variables of Licensure Obtainment and Degree Awarded Status. …
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CORPORATE STRATEGY, EARNINGS MANIPULATION, AND SHORT SELLING
… are significant when the model uses a binary variable instead of a continuous variable to measure the corporate strategy aggressiveness in the robust test. This paper will interest investors that focus on fundamental investing and researchers who study accounting, corporate strategy, and …
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The relationship between faculty's pedagogical content knowledge and students' knowledge about diversity in online courses
… static group design, which consisted of various continuous variable analyses, to examine the relationship between the independent and dependent variables through the use of multiple regression analysis will be used to investigate three research hypotheses of this study.</p>
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STUDIES IN QUANTUM CONTROL AND QUANTUM INFORMATION
… a heat-bath algorithmic cooling framework for continuous variable systems, deriving fundamental cooling limits that distinguish between Gaussian operations and the enhanced capabilities of non-Gaussian operations.
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Design of New-generation Quantum Key Distribution Systems for Secure Communication
… experimentally demanding • Discrete-modulated continuous-variable QKD with high practicality but incomplete in security • Time-bin-encoding continuous-variable QKD with complete security and high practi- cality Their advantages and drawbacks will be contrasted from both the theoretical and …
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Quantum key distribution protocols with high rates and low costs
… the other one is based on discretely signaled continuous variable quantum communication. The security analysis and experimental implementation issues for both protocols are discussed.
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